Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

6 hosts · 473 ms

Download CSV
HostCertsFirst seenLast seen
hvv-deutschlandticket.de 10 2026-05-25 2026-09-19
anmeldung.hvv-deutschlandticket.de 6 2026-04-30 2026-09-14
registrierung.hvv-deutschlandticket.de 1 2026-09-14 2026-09-14
info.hvv-deutschlandticket.de 5 2026-05-11 2026-09-08
news.hvv-deutschlandticket.de 5 2026-05-11 2026-09-08
www.hvv-deutschlandticket.de 10 2026-05-25 2026-09-19

Programmatic access: API GET /v1/hosts/hvv-deutschlandticket.de (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/hvv-deutschlandticket.de.